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  Random template placement and prior information

Röver, C. (2010). Random template placement and prior information. Journal of Physics: Conference Series, 228: 012008.

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 Urheber:
Röver, Christian1, Autor           
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Schlagwörter: -
 Zusammenfassung: In signal detection problems, one is usually faced with the task of searching a parameter space for peaks in the likelihood function which indicate the presence of a signal. Random searches have proven to be very efficient as well as easy to implement, compared e.g. to searches along regular grids in parameter space. Knowledge of the parameterised shape of the signal searched for adds structure to the parameter space, i.e., there are usually regions requiring to be densely searched while in other regions a coarser search is sufficient. On the other hand, prior information identifies the regions in which a search will actually be promising or may likely be in vain. Defining specific figures of merit allows one to combine both template metric and prior distribution and devise optimal sampling schemes over the parameter space. We show an example related to the gravitational wave signal from a binary inspiral event. Here the template metric and prior information are particularly contradictory, since signals from low-mass systems tolerate the least mismatch in parameter space while high-mass systems are far more likely, as they imply a greater signal-to-noise ratio (SNR) and hence are detectable to greater distances. The derived sampling strategy is implemented in a Markov chain Monte Carlo (MCMC) algorithm where it improves convergence.

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 Datum: 2010
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: -
 Identifikatoren: eDoc: 438211
Anderer: arXiv:0911.5051
DOI: 10.1088/1742-6596/228/1/012008
 Art des Abschluß: -

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Titel: 8th Edoardo Amaldi Conference on Gravitational Waves (Amaldi8)
Veranstaltungsort: New York City
Start-/Enddatum: 2009-06-21 - 2009-06-26

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Titel: Journal of Physics: Conference Series
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Bristol : IOP Publ.
Seiten: - Band / Heft: 228 Artikelnummer: 012008 Start- / Endseite: - Identifikator: ISSN: 1742-6588
CoNE: https://pure.mpg.de/cone/journals/resource/111097776606042